80686947 has 16 divisors (see below), whose sum is σ = 124267392. Its totient is φ = 46024320.

The previous prime is 80686943. The next prime is 80686951. The reversal of 80686947 is 74968608.

It is an interprime number because it is at equal distance from previous prime (80686943) and next prime (80686951).

It is not a de Polignac number, because 80686947 - 2² = 80686943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 80686896 and 80686905.

It is not an unprimeable number, because it can be changed into a prime (80686943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71353 + ... + 72474.

It is an arithmetic number, because the mean of its divisors is an integer number (7766712).

Almost surely, 2^80686947 is an apocalyptic number.

80686947 is a deficient number, since it is larger than the sum of its proper divisors (43580445).

80686947 is a wasteful number, since it uses less digits than its factorization.

80686947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143858.

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 80686947 is about 8982.5913299003. The cubic root of 80686947 is about 432.1167433542.

The spelling of 80686947 in words is "eighty million, six hundred eighty-six thousand, nine hundred forty-seven".